BETA ZEN
Sh 2-228
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| Nebula | |
|---|---|
| H II region | |
 | |
| Observation data: J2000 epoch | |
| Right ascension | 05h 13m 25.50s[1] |
| Declination | +37° 27′ 1.0″[1] |
| Distance | 11,000[2] ly |
| Apparent dimensions (V) | 8′ × 8′ |
| Constellation | Auriga |
| Designations | Sh 2-228, LBN 784, Min 2-58, RAFGL 5137, IRAS 05100+3723, GAL 169.19-00.90[1] |
Sh 2-228 (also known as LBN 784) is an emission nebula and H II region located in the constellation of Auriga.[3] It is part of the Sharpless catalog of 313 H II regions compiled by American astronomer Stewart Sharpless.[4]
Sh 2-228 has an asymmetrical shape and is located near the large Auriga OB1 association. It is a region of star formation. Sh 2-228 contains or is associated with the infrared star cluster [IBP2002] CC 01[5] (also known as CC 01), a young open cluster with an estimated mass of about 1800 M☉.[2] The cluster consists of several bright blue stars and a population of fainter stars, with an age of approximately 1–2 million years. Surrounding field stars in the region are older, estimated at 5–6 million years.[2] In the Avedisova Catalogue, the nebula is also associated with some radio wave sources.[6]
Studies based on radio wave emissions have provided for Sh 2-228 a significantly greater distance, around 7,900 parsecs (over 25,000 light-years).[7]
References
- 1 2 3 "Sh 2-228". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-07-01.
- 1 2 3 Borissova, J.; Pessev, P.; Ivanov, V. D.; Saviane, I.; Kurtev, R.; Ivanov, G. R. (2003). "Discovery of new Milky Way star cluster candidates in the 2MASS Point Source Catalog. II. Physical properties of the star cluster CC 01". Astronomy & Astrophysics. 411 (2): 83–90. arXiv:astro-ph/0309196. doi:10.1051/0004-6361:20034009. ISSN 0004-6361.
- ↑ "Sh 2-228". galaxymap.org. Retrieved 2026-07-01.
- ↑ Sharpless, Stewart (1959). "A Catalogue of H II Regions". The Astrophysical Journal Supplement Series. 4: 257. doi:10.1086/190049. ISSN 0067-0049.
- ↑ "[IBP2002] CC01". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2026-07-01.
- ↑ Avedisova, V. S. (March 2002). "A Catalog of Star-Forming Regions in the Galaxy" [A Catalog of Star-Forming Regions in the Galaxy]. Astronomy Reports. 46 (3): 193–205. doi:10.1134/1.1463097. Retrieved 25 April 2013.
- ↑ Paladini, R.; Burigana, C.; Davies, R. D.; Maino, D.; Bersanelli, M.; Cappellini, B.; Platania, P.; Smoot, G. (January 2003). "A radio catalog of Galactic HII regions for applications from decimeter to millimeter wavelengths" [A radio catalog of Galactic HII regions for applications from decimeter to millimeter wavelengths]. Astronomy and Astrophysics. 397: 213–226. arXiv:astro-ph/0210226. doi:10.1051/0004-6361:20021466. Retrieved 25 April 2013.
Bibliography
- Tirion, Wil; Rappaport, Barry; Lovi, George (1987). Uranometria 2000.0 – Volume I – The Northern Hemisphere to −6° [Uranometria 2000.0 – Volume I – The Northern Hemisphere to −6°]. Richmond, Virginia, USA: Willmann-Bell, Inc. ISBN 0-943396-14-X.
- Tirion, Wil; Sinnott, Roger W. (1998). Sky Atlas 2000.0 – Second Edition [Sky Atlas 2000.0 – Second Edition]. Cambridge, USA: Cambridge University Press. ISBN 0-933346-90-5.
External links
- "Sky-Map.org – Sharpless Catalogue (from 221 to 230)".
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